:enabled Selector

jQuery(':enabled')

Description: Selects all elements that are enabled.
As with other pseudo-class selectors (those that begin with a ":") it is recommended to precede it with a tag name or some other selector; otherwise, the universal selector ("*") is implied. In other words, the bare $(':enabled') is equivalent to $('*:enabled'), so $('input:enabled') should be used instead.

Example:
Finds all input elements that are enabled.
<!DOCTYPE html>
<html>
<head>
  <script src="http://code.jquery.com/jquery-latest.js"></script>
</head>
<body>
  <form>

    <input name="email" disabled="disabled" />
    <input name="id" />
  </form>
<script>$("input:enabled").val("this is it");</script>

</body>
</html>

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